I didn't read the post where someone claimed that today's players are weaker than previous generations. Today's players are bigger, stronger, better conditioned, etc. no question.
An argument could be made, however, that with today's purses, one doesn't have to win anything and can still live a million dollar lifestyle. For those players, being in contention to win tournaments, especially majors, is not comfortable. We have seen this happen in years past with Mickelsen, Garcia, Westwood, Love, Couples and many others. When it came time to make a shot to win, many times they didn't perform. In Mickelsen's case, that has now changed. But I bet the other names mentioned would agree that they let tournament slip away that they shouldn't have. What has set Tiger apart from the others is that he has, for the most part, not let tournaments slip away when he had the lead.
The same could probably be said of many pros in Jack's era as well, but there did seem to be a number of players who could stare down Jack and win. Certainly Watson and Trevino come to mind immediately, but there were others like Billy Casper, Gene Littler and Hale Irwin. When they were in the mix on Sunday afternoons, they rarely folded. Whether that was due to their internal makeup or whether they needed to win in order to cash a big check is up for discussion.
In any event, it's good to see some of today's players starting to step up to challenge Tiger. Certainly makes for more interesting TV viewing.